Abstract:

In this study,three kinds of fast growing Poplar,Poplar 72 (Populus×euramericana cv.I-72/58),Poplar 63(P.deltoides cv.I-63/51),Poplar 69(P.deltoides cv.I-69/55),in brief,it is called Poplar 72,Poplar 63,Poplar 69 in the following,grown in three different beaches of Changjiang River(River beach,Islet beach and Lake beach)with three different spaces(3m×4m,4m×5m,5m×6m)were selected as the materials.Their relationships between the wood properties and forest culture were systematically revealed.The results show that:(1)There are large differences for the wood properties of poplar grown in the beaches of Changjiang River influenced by different clones.The longest fiber length,the lest microfibril angle and the largest vessel proportion for poplar 63 grown in the beaches of Anhui and Hubei,and poplar 72 grown in Hunan were revealed.It indicates that there are significant differences for microfibril angle and main physical mechanical properties of poplar 72,poplar 63 and poplar 69 by variance analysis.(2)There are large or small differences of wood properties influenced by different beaches.It indicates that there are significant differences for microfibril angle,basic density,bending strength and rate of shrinkage of poplar 63 and poplar 69 by variance analysis.(3)The effects of spaces on wood properties of poplar 72,poplar 63 and poplar 69 change with different wood property.For poplar 72,polar 63 and poplar 69,the wider the spaces,the larger the microfibril angle and the proportion of vessel,the shorter the fiber length,the proportion of fiber and ray,the basic density,the modulus of elasticity and the modulus of rupture.It indicates that different spaces have larger influences on poplar 72 and poplar 69 than poplar 63 by variance analysis.

Key words: Plantation of poplar, Wood properties, Forest cultures, Relationships between wood properties and forest cultures